#include "L10nLoader.hpp"
#include <vector>
#include <memory>
#include <QApplication>
#include <QLocale>
#include <QTranslator>
#include <QRegularExpression>
#include <QDebug>
#include "qt_helpers.hpp"
#include "Logger.hpp"
#include "pimpl_impl.hpp"
class L10nLoader::impl final
{
public:
explicit impl(QApplication * app)
: app_ {app}
{
}
bool load_translator (QString const& filename
, QString const& directory = QString {}
, QString const& search_delimiters = QString {}
, QString const& suffix = QString {})
{
std::unique_ptr<QTranslator> translator {new QTranslator};
if (translator->load (filename, directory, search_delimiters, suffix))
{
install (std::move (translator));
return true;
}
return false;
}
bool load_translator (QLocale const& locale, QString const& filename
, QString const& prefix = QString {}
, QString const& directory = QString {}
, QString const& suffix = QString {})
{
std::unique_ptr<QTranslator> translator {new QTranslator};
if (translator->load (locale, filename, prefix, directory, suffix))
{
install (std::move (translator));
return true;
}
return false;
}
void install (std::unique_ptr<QTranslator> translator)
{
app_->installTranslator (translator.get ());
translators_.push_back (std::move (translator));
}
QApplication * app_;
std::vector<std::unique_ptr<QTranslator>> translators_;
};
L10nLoader::L10nLoader (QApplication * app, QLocale const& locale, QString const& language_override)
: m_ {app}
{
LOG_INFO (QString {"locale: language: %1 script: %2 country: %3 ui-languages: %4"}
.arg (QLocale::languageToString (locale.language ()))
.arg (QLocale::scriptToString (locale.script ()))
.arg (QLocale::countryToString (locale.country ()))
.arg (locale.uiLanguages ().join (", ")));
// we don't load translators if the language override is 'en',
// 'en_US', or 'en-US'. In these cases we assume the user is trying
// to disable translations loaded because of their locale. We cannot
// load any locale based translations in this case.
auto skip_locale = language_override.contains (QRegularExpression {"^(?:en|en[-_]US)$"});
//
// Enable base i18n
//
QString translations_dir {":/Translations"};
if (!skip_locale)
{
LOG_TRACE ("Looking for locale based Qt translations in resources filesystem");
if (m_->load_translator (locale, "qt", "_", translations_dir))
{
LOG_INFO ("Loaded Qt translations for current locale from resources");
}
// Default translations for releases use translations stored in
// the resources file system under the Translations
// directory. These are built by the CMake build system from .ts
// files in the translations source directory. New languages are
// added by enabling the UPDATE_TRANSLATIONS CMake option and
// building with the new language added to the LANGUAGES CMake
// list variable. UPDATE_TRANSLATIONS will preserve existing
// translations but should only be set when adding new
// languages. The resulting .ts files should be checked info
// source control for translators to access and update.
// try and load the base translation
LOG_TRACE ("Looking for WSJT-X translations based on UI languages in the resources filesystem");
for (QString locale_name : locale.uiLanguages ())
{
auto language = locale_name.left (2);
if (locale.uiLanguages ().front ().left (2) == language)
{
LOG_TRACE (QString {"Trying %1"}.arg (language));
if (m_->load_translator ("wsjtx_" + language, translations_dir))
{
LOG_INFO (QString {"Loaded WSJT-X base translation file from %1 based on language %2"}
.arg (translations_dir)
.arg (language));
break;
}
}
}
// now try and load the most specific translations (may be a
// duplicate but we shouldn't care)
LOG_TRACE ("Looking for WSJT-X translations based on locale in the resources filesystem");
if (m_->load_translator (locale, "wsjtx", "_", translations_dir))
{
LOG_INFO ("Loaded WSJT-X translations for current locale from resources");
}
}
// Load any matching translation from the current directory
// using the command line option language override. This allows
// translators to easily test their translations by releasing
// (lrelease) a .qm file into the current directory with a
// suitable name (e.g. wsjtx_en_GB.qm), then running wsjtx to
// view the results.
if (language_override.size ())
{
auto language = language_override;
language.replace ('-', '_');
// try and load the base translation
auto base_language = language.left (2);
LOG_TRACE ("Looking for WSJT-X translations based on command line region override in the resources filesystem");
if (m_->load_translator ("wsjtx_" + base_language, translations_dir))
{
LOG_INFO (QString {"Loaded base translation file from %1 based on language %2"}
.arg (translations_dir)
.arg (base_language));
}
// now load the requested translations (may be a duplicate
// but we shouldn't care)
LOG_TRACE ("Looking for WSJT-X translations based on command line override country in the resources filesystem");
if (m_->load_translator ("wsjtx_" + language, translations_dir))
{
LOG_INFO (QString {"Loaded translation file from %1 based on language %2"}
.arg (translations_dir)
.arg (language));
}
}
// Load any matching translation from the current directory using
// the current locale. This allows translators to easily test their
// translations by releasing (lrelease) a .qm file into the current
// directory with a suitable name (e.g. wsjtx_en_GB.qm), then
// running wsjtx to view the results. The system locale setting will
// be used to select the translation file which can be overridden by
// the LANG environment variable on non-Windows system.
// try and load the base translation
LOG_TRACE ("Looking for WSJT-X translations based on command line override country in the current directory");
for (QString locale_name : locale.uiLanguages ())
{
auto language = locale_name.left (2);
if (locale.uiLanguages ().front ().left (2) == language)
{
LOG_TRACE (QString {"Trying %1"}.arg (language));
if (m_->load_translator ("wsjtx_" + language))
{
LOG_INFO (QString {"Loaded base translation file from $cwd based on language %1"}.arg (language));
break;
}
}
}
if (!skip_locale)
{
// now try and load the most specific translations (may be a
// duplicate but we shouldn't care)
LOG_TRACE ("Looking for WSJT-X translations based on locale in the resources filesystem");
if (m_->load_translator (locale, "wsjtx", "_"))
{
LOG_INFO ("loaded translations for current locale from a file");
}
}
// Load any matching translation from the current directory using
// the command line option language override. This allows
// translators to easily test their translations on Windows by
// releasing (lrelease) a .qm file into the current directory with a
// suitable name (e.g. wsjtx_en_GB.qm), then running wsjtx to view
// the results.
if (language_override.size ())
{
auto language = language_override;
language.replace ('-', '_');
// try and load the base translation
auto base_language = language.left (2);
LOG_TRACE ("Looking for WSJT-X translations based on command line override country in the current directory");
if (m_->load_translator ("wsjtx_" + base_language))
{
LOG_INFO (QString {"Loaded base translation file from $cwd based on language %1"}.arg (base_language));
}
// now load the requested translations (may be a duplicate
// but we shouldn't care)
LOG_TRACE ("Looking for WSJT-X translations based on command line region in the current directory");
if (m_->load_translator ("wsjtx_" + language))
{
LOG_INFO (QString {"loaded translation file from $cwd based on language %1"}.arg (language));
}
}
}
L10nLoader::~L10nLoader ()
{
}